import axios from 'axios'
import { Message, MessageBox } from 'element-ui'
import store from '@/store'
import { getToken, setRefreshToken, setToken } from '@/utils/auth'
import { tokenRefresh } from '@/api/user'
import router from '@/router'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent

    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['Authorization'] = `Bearer ${getToken()}`
    }
    return config
  },
  error => {
    // do something with request error
    // console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
   */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data
    console.log(`success: ${response.config.url} :`, response.data)
    if (res.code === 13) {
      // 令牌刷新成功
    }

    // if the custom code is not 20000, it is judged as an error.
    if (res.code < 1) {
      // Message({
      //   message: res.message || 'Error',
      //   type: 'error',
      //   duration: 5 * 1000
      // })

      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
          confirmButtonText: 'Re-Login',
          cancelButtonText: 'Cancel',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.message || 'Error'))
    } else {
      return res
    }
  },
  error => {
    const res = error.response.data
    console.log(`error: ${error.response.config.url} :`, error.response.data)

    if (res.code === 10) {
      // 登录失败
      return Promise.reject(res)
    }

    if (res.code === 11) {
      // 令牌过期
      tokenRefresh().then(res => {
        const { access_token, refresh_token } = res.data
        setToken(access_token)
        setRefreshToken(refresh_token)
        error.config.headers.Authorization = `Bearer ${access_token}`
        return axios(error.config)
      })
    }

    if (res.code === 12) {
      // 令牌刷新失败
      store.dispatch('user/resetToken').then(() => {
        Message({
          message: '登录已过期',
          type: 'error',
          duration: 5 * 1000
        })
        router.replace(`/login?redirect=${router.currentRoute.fullPath}`)
      })
      return Promise.reject(res)
    }
    return Promise.reject(res)
  }
)

export default service
